AME, Inc.
300mA CMOS LDO with RESET Function
AME1300
n Detailed Description
The AME1300 is a combination of a fixed output, low
drop-out regulator and microprocessor monitor. Unlike
bipolar regulators, the AME1300 supply current does not
increase with load current. In addition,VOUT remains stable
andwithin regulation at very low load currents(an impor-
tant consideration in RTC and CMOS RAM battery back-
up applications) as well as with any type of capacitor
(see below). AME1300 pin functions are detailed below:
RESET
C1
RESET
VOUT
VDET
VDET
VIN
C1
1µF
2.2µF
+
1300
GND
NC
EN
Battery
Bypass
CBypass
(Option)
EN Control
(from Power
Control Logic)
470pF
n Pin Description
Pin #
Pin Name
Pin Description
RESET output remains low while VDET is below the reset voltage
threshold, and for 300msec VDET rises above reset theshold.
1
RESET
Regulated Voltage Output.
Ground Terminal.
2
3
4
VOUT
GND
Reference Bypass Input. Connecting a 1000pF to this input further
reduces output noise.
Bypass
Shutdown Control Input. The regulator is fully enabled when a logic
high is applied to this input. The regulator enters shutdown when a
logic low is applied to this input. During shutdown, regulator output
5
EN
voltage falls to zero, RESET output remains valid and supply current
is reduced to 10 A (typ.)
µ
No connect.
6
7
8
NC
VIN
Power Supply Input.
Detected input Voltage. VDET and VOUT can be connected together.
VDET
6
AME [ ANALOG MICROELECTRONICS ]
